Year	% (modeled ILO estimate)
1991	34.036
1992	32.622
1993	30.757
1994	30.313
1995	30.016
1996	30.121
1997	29.803
1998	29.273
1999	29.379
2000	29.541
2001	29.525
2002	29.421
2003	29.602
2004	29.955
2005	30.747
2006	31.516
2007	31.796
2008	31.733
2009	35.729
2010	34.692
2011	33.797
2012	33.547
2013	33.248
2014	32.735
2015	32.585
2016	32.036
2017	31.622
2018	31.26
2019	30.655
2020	27.954
2021	28.872
2022	31.029
2023	31.111